package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;


@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;


        /*
        *
        新增菜品和对应的口味
         *
         */
        @Transactional
        public void saveWithFlavor(DishDTO dishDTO){
           //对象转换。
            Dish dish = new Dish();
            //属性拷贝
            BeanUtils.copyProperties(dishDTO,dish);
            //向菜品表中插入1条数据
            dishMapper.insert(dish);

            //获取insert语句生成的主键值

            Long dishId = dish.getId();

            //获取菜品口味，遍历集合
            List<DishFlavor>flavors = dishDTO.getFlavors();
            if (flavors !=null && flavors.size()>0){
                flavors.forEach(dishFlavor -> {
                    dishFlavor.setDishId(dishId);
                });

                //向口味表中插入一批数据
                dishFlavorMapper.insertBatch(flavors);



        }
    }


    /*
    * 菜品分页查询
    * */

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        //开始分页查询
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        //调用mapper方法，把数据封装到集合中
        Page <DishVO> page =dishMapper.pageQuery(dishPageQueryDTO);
        //前端需要的数据为total   records
        //把数据封装到PageResult实体类中，以josn形式返回
        return new PageResult(page.getTotal(),page.getResult());
    }




    /*
    * 批量删除菜品
    * */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //判断当前菜品是否能够删除
        //1.是否在启售中---启售中则不能删除
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus() == StatusConstant.ENABLE) {
                //表示当前菜品起售中，不能删除，抛异常
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }

        //2.判断当前菜品是否在套餐中---在套餐中则不能删除
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (setmealIds !=null && setmealIds.size()>0){
            //当前菜品被套餐关联了，不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        //删除菜品表中的菜品数据
        for (Long id : ids) {
            dishMapper.deleteById(id);
            //删除菜品口味关联的数据
            dishFlavorMapper.deleteByDishID(id);

        }
    }





    /*
    * 根据id查询菜品
    * 修改回显
    * */
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        log.info("根据id查询菜品:{}",id);
        //根据id查询菜品数据
        Dish dish = dishMapper.getById(id);

        //根据菜品id查询口味数据
        List<DishFlavor>dishFlavors =  dishFlavorMapper.getByDishId(id);


        //将查询到的数据封装到VO
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }





    /*
    * 修改菜品
    * */
    @Override
    public void updateeWithFlavor(DishDTO dishDTO) {
        //对象转换
        Dish dish = new Dish();
        //拷贝属性
        BeanUtils.copyProperties(dishDTO,dish);
        //修改菜品表基本信息
        dishMapper.update(dish);
        //删除原有的口味数据
        dishFlavorMapper.deleteByDishID(dishDTO.getId());
        //重新插入口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();

        if (flavors != null && flavors.size() > 0){
            //向口味表插入n条数据
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });

        }


        dishFlavorMapper.insertBatch(flavors);

    }




    /*
    * 根据分类id查询菜品
    * */
    @Override
    public List<Dish> list(Long categoryId,String name) {
        Dish dish = Dish.builder()
                .name(name)
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();

        return dishMapper.list(dish);
    }




    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        dishMapper.startOrStop(status, id);
    }
}
